func test_bitnot_debug() {
    var a int = 5
    var bit_not int = ~a

    println("a =")
    println(a)
    println("~a =")
    println(bit_not)
    println("Expected: -6")

    if bit_not == -6 {
        println("CORRECT")
    } else {
        println("WRONG")
    }

}
